Problem about InfluxDb university's "Building IoT Apps with InfluxDB" course

I’m new to here.
And I tried to study with InfluxDb university’s “Building IoT Apps with InfluxDB” course.
iot-center-v2 github link is broken and I thought it moved to francisrod01’s.
During the test, every proxy request to influx cloud2 failed with error : Unauthorized access.
So I tried to print the authorization header, it’s always ‘redacted’.
Did I something wrong?